[antlr-interest] Re: AST generation
Tak-po Li
takpoli at hotmail.com
Wed Feb 16 12:38:05 PST 2005
Hi Loring,
Thanks for your help.
1. I try the following:
list_of_ports
: (a:LPAREN^ name_of_port (COMMA! name_of_port)* RPAREN!)?
{a.setText("list_of_ports")}
;
Am I correct? It seems it is not working for me.
2. As the usage of setType(), where can I find it is being defined? Are all
bits for external usage or some bits are reserved for (Antlr) internal
usage? Should I use getType() to get information back? Could you point me
to some examples?
Thanks again
Tak
>From: Loring Craymer <Loring.G.Craymer at jpl.nasa.gov>
>To: Tak-po Li <takpoli at hotmail.com>, antlr-interest at antlr.org
>Subject: Re: [antlr-interest] Re: AST generation
>Date: Mon, 14 Feb 2005 14:57:10 -0800
>
>You can setType() and setText() on any node. That's usually the easy
>solution.
>
>--Loring
>
>
>At 01:24 PM 2/14/2005, Tak-po Li wrote:
>
>
>>An example of module in Verilog looks as following:
>>
>>Module (A, B, C);
>> .
>> .
>> .
>>endmodule;
>>
>>
>>I am using the following to generate the AST tree for the above:
>>
>>list_of_ports
>> : (LPAREN^ name_of_port (COMMA! name_of_port)* RPAREN!)?
>> ;
>>module : "module"^ name_of_module list_of_ports SEMI!
>> (module_item)*
>> "endmodule"!
>> ;
>>
>>AST tree is generated correctly. However, one of the node is "(" which is
>>generated by LPAREN^ statement. Could I change "(" to something else in
>>AST generation that I would have less problem in AST tree walk later?
>>
>>
>>I am new to Antlr. Could someone help? Thanks.
>>
>>
>>Tak
>>
>
>
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